Electrical binding-screw.



No. 804,133. PATENTED NOV."7,1905., w, KAISLING. ELECTRICAL BINDINGscmzw.

AYPLIOATION FILED HAY 22, 1903.

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UNITED STTES retainer orrion.

WILLIAM KAISLING, OF CHICAGO, ILLINOIS, ASSIGNOR STROMBERG- OARLSONTELEPHONE MANUFACTURING COMPANY, OF ROCHESTER, NEW YORK, A CORPORATIONOF NEW YORK.

' ELECTRICAL BINDING-SCREW.

No. 804,133. I Specification of Letters Patent. Patented Nov. '7, 1905.

Application filed May 22, 1903. Serial No. 158,231.

T on whom i y con 06 ductors. Fig. 2 shows a vertical central sec- Be itknown that I, WILLIAM KAIsLINe, a tional view therethrough. Fig. 3 is afront 55 citizen of the United States, residing at Ohiview thereof.

cago, in the county of Cook and State of Illi- Like characters ofreference refer to like nois, have invented a certain new and usefulparts throughout the various figures.

Improvement in Electrical Binding-Screws, A screw has a threaded end 1,ahead 2, and

(Case No. 8,)of which the following is a full, a reduced shank portion3, the diameter of 60 clear, concise, and exact description, referencethe shank portion being preferably slightly beingv had to theaccompanying drawings, less than the diameter at the base of the IQforming a part of this specification. threads at the end of said screw.A receiving- My invention relates to electrical bindingbase 4 may have athreaded opening 5 for re screws, and has for its object an improveddeceiving the screw. A mounting-block 6, which 5 vice to which aconductor or electrical termimay be of insulating material, has athreaded nal may be more readily applied and secured. opening 7 forreceiving the screw, the receiv- 5 My invention is particularlyadaptable in ing-base 4 being secured to said mountingthe telephone art,where a great number of block so that the opening therein alines withsuch binding-screws are employed and where the opening in the block. Inordinary prac- 7 such binding-screws are very small and emtice thebase-piece 4 is very thin and the openployed in crowded and crampedplaces. Such ing instead of being threaded may be made binding-screwsusually consist of a screw over large enough to allow the threadedportion of which may be passed a washer, the conductor a the screw topass therethrough, the screw beor terminal being secured between thewasher ing engaged by the threaded opening in the 75 and a receivingmember which said screw enmounting-block. A washer 8 is retained upongages. the shank portion between the threaded por- 2 5 Heretofore it hasbeen very diflicult and tion and the head of the screw. This retentryingto apply the' conductor in place below tion may be accomplished bythreading the the washer, and my invention provides means opening 9through the washer to receive the 80 whereby the washer may be raised toleave a threaded end of the screw, the washer after clear space to whichthe conductor or termipassing out of engagement with said thread- 3 nalmay be readily applied. ed end passing on to the reduced unthreadedGenerally speaking, my invention consists shank portion and beingprevented from reof a screw having a threaded end, the diamemovaltherefrom otherwise than by being un- 5 ter of the shank portion betweenthe threadscrewed over the threaded portion. ed end and the head beingreduced. A re- The conductor or conductor-tip desired to ceiving member,which may form the termibe secured is introduced between the base pornalof a conductor, has a threaded opening to tion 4 and the washer 8, beingclamped therereceive the threaded end of the screw. A between as thescrew is brought into threaded 9 washer is mounted upon the reducedshank engagement with the mounting-block. To portion of the screw and isretained thereon facilitate the insertion of the conductor or 40 andadapted to move only between the threadconductor-tip 13 between thewasher and the ed portion and the head of the screw. Upon base portion,the washer may be raised away unscrewing of the screw the washer iscarfrom said portion by a sufficient disengage- 95 ried away from thereceiving member, thus ment of the screw from the mounting-block,leaving a clear space for receiving a conducwhereby the washer iscarried away from the tor-tip or a wire, which may be clampedbereceiving portion. The conductor or terminal tween the washer and thereceiving member may now be inserted without the trying opas the screwis again brought into engageeration of first removing the washer againstI00 ment with the receiving member. the impedance of the threads on thescrew.

I shall describe my invention more fully The receiving member 4. may beprovided 5 with reference to the accompanyingdrawings, with acontact-tip 11, and to hold the wire or in whichterminal 13 in place asthe washer is brought Figure 1 is an elevation view of the device, intoclamping engagement therewith sections 5 showing its adaptation forconnecting con- 12 12 of annular walls are provided upon said receivingmember between which walls the washer is adapted to fit as the wire orterminal is clamped into engagement with the receiving member. The headof the screw may be slotted to receive a screwdriver or other instrumentor maybe provided with athumbscrew head 14, as shown in Fig. 2.

I claim as new and desire to secure by Letters Patent 1. In a device ofthe class described, the combination with a screw provided with threadsonly at its end and having a reduced shank portion between said threadedend and its head,of a washer,and athreaded opening for said washer forengaging said threaded end, the threaded end serving for retaining saidwasher upon the unthreaded shank portion of said screw. so that it mayhave free longitudinal motion thereon, substantially as described.

2. In a device of the class described, the combination with a screwthreaded only at its end portion, of a receiving member having athreaded opening for receiving the threaded end of said screw, theunthreaded shank portion of said screw havingareduced diameter, a washerloosely engaging said unthreaded portion, and having a threaded openingfor receiving said screw, the threads on said screw preventing saidwasher from leaving said shank portion otherwise than by being unscrewedfrom said screw, substantially as described.

3. In combination, a screw threaded only at its end portions, areceiving member for receiving said screw, the diameter of theunthreaded shank portion being less than the diameter at the base of thethreads upon said end portion, a washer normally engaging saidunthreaded and reduced shank portion to be longitudinally freely movablethereon, said washer having a threaded opening to engage the threadedend of said screw, the threads on said screw portion preventing removalof said washer otherwise than being unscrewed from the screw,substantially as described.

4. Incombination,ascrew havingathreaded end portion, a reduced shankportion between said threaded end and the head of said screw, a washerloosely and rotatably retained upon said reduced shank portion, areceiving member having a threaded opening for receiving the threadedend of said screw, and annular walls extending from said receivingmember and disposed to surround said washer as said screw is screwedinto said receiving member, substantially as described.

5. In combination, a mounting, a base member secured to said mounting,ascrew having a threaded end passing through said base member intothreaded engagement with said mounting, the shank portion of said screwbetween the threaded end and the head thereof having a reduced diameter,a washer loosely retained upon said unthreaded shank portion, andannular walls extending from said base member and disposed about theperiphery of said washer as said screw is brought into threadedengagement with said mounting, substantially as described.

6. In combination, a mounting-block of insulating material, a terminalmember secured thereto, a screw having threads only at its end andpassing through an opening through said terminal member to engage athreaded opening in said mounting-block, the unthreaded shank portion ofsaid screw having a diameter less than the diameter at the base of thethreads of said screw, a washer normally engaging said unthreaded andreduced shank portion to be longitudinally freely movable thereon, saidwasher havinga threaded opening to engage the threaded end of saidscrew, the threads on said screw preventingremoval of said washerotherwise than being unscrewed therefrom.

7. In combination, a mounting-block of insulating material, a terminalmember secured thereto, a screw having threads only at its end andpassing through an opening through said terminal member to engage athreaded openingin said mounting-block, the unthreaded shank portion ofsaid screw having a diameter less than the diameter at the base of thethreads of said screw, a washer normally engaging said unthreaded andreduced shank portion to be longitudinally freely movable thereon, saidwasher having a threaded opening to engage the threaded end of saidscrew, the threads on said screw preventing the removal of said washerotherwise than being unscrewed therefrom, and annular walls extendingfrom said terminal member between which said washer is disposed asit isbrought into clamping engagement with said terminal member,substantially as described.

8. Theherein-describedbinding-screw,having a threaded washer under itshead, mounted but'free to turn on the neck of the screw, substantiallyas described.

9. The herein-described binding-screw having a reduced neck with awasher on the said neck, the washer being provided with a centralthreaded opening for passing over the threaded portion of the screw.

In witness whereof I hereunto subscribe my name this 18th day of May, A.D. 1903.

WILLIAM KAISLING.

Witnesses: 1 LYNN A. WILLIAMs, CHARLES J. SCHMIDT.

